A person trained and qualified to better people through auditing is called an auditor. Auditor is defined as one who listens, from the Latin audire meaning to hear or listen. An auditor is a minister or minister-in-training of the Church of Scientology.

A person receiving auditing is called a preclear—from pre (before) and “Clear,” a person not yet Clear. A preclear is a person who, through auditing, is finding out more about himself and life.